In 2026, Colorado child support is calculated under statutory guidelines that define income and apply a schedule with adjustments for things like parenting time, health insurance, and child care. When income is variable, courts often rely on tax returns, year to date profit and loss records, and consistent documentation that shows true earnings over time. If a parent is self-employed, clear records of business expenses and gross receipts matter because the court must determine actual income under the guideline framework. Once an order is entered, income withholding can be used to collect support and maintenance, and Colorado courts explain how income assignments work. Because calculations are sensitive to inputs, errors in income or parenting time numbers can create big monthly differences. A lawyer can help you present accurate financial evidence and spot guideline issues that could otherwise lead to an unfair order.